Multichannel Expansion with PV_BrickWall

1

Hi -
I wanted to test four channels into the PV_BrickWall filter. I’m not able to explain the results. I seem to only be getting two channels of output, with most of the signal on the first channel.
Can anyone help me understand this? Thanks.

(
{
    var in, chain;
    in = WhiteNoise.ar(0.2)!4;
    chain = FFT(LocalBuf(2048, 4), in);
    chain = PV_BrickWall(chain, SinOsc.kr(0.1));
    IFFT(chain);
}.play;
s.meter;
)
2 
FFT(Array.fill(4, { LocalBuf(2048, 1) }, in)

FFT buffers must be single-channel only, but you can use one buffer per channel.

hjh